On 10 March 1965, a bomb planted by Indonesian saboteurs on a mezzanine floor of the building exploded, killing three people and injuring 33 others. This was one of a number of terrorist attacks in Singapore during the Indonesia–Malaysia confrontation in support of PresidentSukarno's opposition to the merger of Singapore, Malaya, Sabah and Sarawak to form the Federation of Malaysia. Two members of the Indonesian Marine Corps were eventually convicted and executed for the crime.